Use PreloadCheckGroup in ExtensionInstallChecker. Make RequirementsChecker a PreloadCheck.

chrome/browser/extensions/api/management/chrome_management_api_delegate.cc

Index: chrome/browser/extensions/api/management/chrome_management_api_delegate.cc
diff --git a/chrome/browser/extensions/api/management/chrome_management_api_delegate.cc b/chrome/browser/extensions/api/management/chrome_management_api_delegate.cc
index 9d52108e54c9fc2938db21006f21b84e21c4e0ea..2857e8fa39a2e018c20890edc13fba7e53c1184e 100644
--- a/chrome/browser/extensions/api/management/chrome_management_api_delegate.cc
+++ b/chrome/browser/extensions/api/management/chrome_management_api_delegate.cc
@@ -10,7 +10,6 @@
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/extensions/bookmark_app_helper.h"
 #include "chrome/browser/extensions/chrome_extension_function_details.h"
-#include "chrome/browser/extensions/chrome_requirements_checker.h"
 #include "chrome/browser/extensions/extension_service.h"
 #include "chrome/browser/extensions/extension_util.h"
 #include "chrome/browser/extensions/launch_util.h"
@@ -37,6 +36,7 @@
 #include "extensions/browser/extension_prefs.h"
 #include "extensions/browser/extension_registry.h"
 #include "extensions/browser/extension_system.h"
+#include "extensions/browser/requirements_checker.h"
 #include "extensions/common/constants.h"
 #include "extensions/common/extension.h"
 
@@ -225,11 +225,6 @@ ChromeManagementAPIDelegate::SetEnabledFunctionDelegate(
           web_contents, browser_context, extension, callback));
 }
 
-std::unique_ptr<extensions::RequirementsChecker>
-ChromeManagementAPIDelegate::CreateRequirementsChecker() const {
-  return base::MakeUnique<extensions::ChromeRequirementsChecker>();
-}
-
 std::unique_ptr<extensions::UninstallDialogDelegate>
 ChromeManagementAPIDelegate::UninstallFunctionDelegate(
     extensions::ManagementUninstallFunctionBase* function,